Molar response of polychlorinated dibenzo-p-dioxins and dibenzofurans by the mass spectrometric detector

Abstract

The mass spectrometric detector (MSD) with electron Ionization gives a molar response for CI"DD/CI,DF ( = 1-8).This response does not depend on the position or the number of chloride atoms but on the molecular skeleton of the CljDD/ CljDF alone. The ratio of the molar response of CIJ)F to CljDD Is 1.35 ± 0.1. The carbon skeleton based molar response of the MSD can simplify the quantitation of CljDD/ CljCF and other arenes In GC/MSD substantially. Used In an appropriate way It may supplement the Isotope dilution technique. The flame Ionization detector (FID) and the atomic emission detector (AED), due to their molar response characteristics for defined elements, can be used for the quantitation of standard solutions In the microgram per milliliter range of polychlorinated dlbenzo-p-dloxlne and dibenzofurans (CljDD/CljDF). Specifically, the highly toxic compounds of the 2,3,7,8-group of the CI,DD/CI"DF do not have to be handled In bulk and can be quantified after capillary GC with nontoxic congeners as references. The molar response of the electron capture detector (ECD) Is structure-dependent and Is higher for CI4DF/CleDF than for CI4DD/CI5DD.

Methyl Sulfonyl Polychlorinated Biphenyls and 2,2-Bis(4-Chlorophenyl)-1,1-Dichlorethene in Gray Seal Tissues Determined by Gas Chromatography With Electron Capture Detection and Atomic Emission Detection

“…In addition, MeSO 2 -CBs with different degrees of chlorination can be determined by their chlorine to sulfur ratios. The AED is known to exhibit a response that to a high Reference 3-CH 3 SO 2 -2,2Ј,5,5Ј-CB 3-CH 3 SO 2 -2,2Ј,4Ј,5-CB 4-CH 3 SO 2 -2,2Ј,5,5Ј-CB 4-CH 3 SO 2 -2,2Ј,4Ј,5-CB 3-CH 3 SO 2 -2 degree is compound independent when detecting similar compounds as PCB or dioxin congeners [22][23][24]. This characteristic is valuable especially for the quantification of those congeners for which standard compounds are lacking.…”

Some unique properties of gas chromatography coupled with atomic-emission detection

“…Time-consuming determination of individual response factors would not be required, which would make it unnecessary to obtain and deal with all the analytes in the pure form. This is a particularly pleasing aspect when dealing with highly toxic substances such as phosgene [4], chemical warfare-related materials [5], or polychlorinated dibenzodioxins [6].…”

Methyl sulfonyl polychlorinated biphenyls and 2,2‐bis(4‐chlorophenyl)‐1,1‐dichlorethenein gray seal tissues determined by gas chromatography with electron capture detection and atomic emission detection

“…In addition, MeSO 2 ‐CBs with different degrees of chlorination can be determined by their chlorine to sulfur ratios. The AED is known to exhibit a response that to a high degree is compound independent when detecting similar compounds as PCB or dioxin congeners [22–24]. This characteristic is valuable especially for the quantification of those congeners for which standard compounds are lacking.…”